Unveiling microbial electricity driven anoxic ammonium removal
dc.contributor.author
dc.date.accessioned
2022-03-02T10:22:41Z
dc.date.available
2022-03-02T10:22:41Z
dc.date.issued
2022-02
dc.identifier.uri
dc.description.abstract
Microbial electricity-driven anoxic ammonium removal could remove ammonium from wastewater without the presence of oxygen (aeration) using electricity. This study aims at unveiling the potential biologic pathways for the bioelectrochemical oxidation of ammonium to dinitrogen gas in an anaerobic bioelectrochemical system (BES). Known intermediate metabolites of this process (hydroxylamine, nitrite and nitrate) were monitored in two BES replicates. Ammonium was fully oxidized to dinitrogen gas without intermediates accumulation in the anodic chamber. Achromobacter sp. was the most abundant microorganism (up to 60%, according to sequence reads) in the mixed community. Hydroxylamine and nitrite oxidation were electroactive processes, reinforcing the role of the anodic electrode as the electron acceptor for ammonium oxidation. Taking it all together, ammonium can be removed in BES by a combination of different bio/electrochemical processes. A deeper understanding on how the different metabolisms are coupled together is required for increasing the current ammonium removal rates
dc.description.sponsorship
This work was funded through the European Union's Horizon 2020
project ELECTRA [no. 826244]. M. O-A. was supported by a grant from
University of Girona (IFUdG2018/50). S.P is a Serra Húnter Fellow
(UdG-AG-575) and acknowledges the funding from the ICREA Academia
award. LEQUiA [2017-SGR-1552] and Ecoaqua [2017SGR- 548] have
been recognized as consolidated research groups by the Catalan
Governmen
Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1016/j.biteb.2022.100975
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Bioresource Technology Reports, 2022, vol. 17, art. núm. 100975
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Articles publicats (D-EQATA)
dc.rights
Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.uri
dc.subject
dc.title
Unveiling microbial electricity driven anoxic ammonium removal
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.relation.projectID
info:eu-repo/grantAgreement/EC/H2020/826244/EU/Electricity driven Low Energy and Chemical input Technology foR Accelerated bioremediation/ELECTRA
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
034828
dc.contributor.funder
dc.type.peerreviewed
peer-reviewed
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
2589-014X